remove old README

selfdrive/car/README

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-In here lies the car abstraction layer, and is part of what you will implement to add a new car
-
-== Car State ==
-
-Implement the following minimal set of sensors:
-  Speed -- best estimate of the speed of the car
-  SteeringAngle -- current angle of the steering wheel
-  ControlSurface -- gas position, brake position, steering torque
-
-Implement the following optional sensors:
-  RadarPoints -- Currently not optional, but could be with VOACC. Data from the radar of the car.
-  WheelSpeeds -- The speed of the 4 wheels of the car. To be used for odometry
-
-Implement the following controls:
-  ControlSurface -- gas position (optional if PCM), brake position, steering torque
-
-If you don't have a pedal interceptor and you use the PCM cruise control:
-  CruiseState -- If system is enabled, and current set speed
-  CruiseControl -- Commands to modify system speed and acceleration
-
-== Car UI ==
-
-I suspect many cars with ACC and LKAS have similar UIs
-
-HUDControl
-
-== Car Buttons ==
-
-Uses an evented protocol
-
-* Blinkers
-* Cruise buttons
-* Other buttons
-
-== Car Errors ==
-
-See capnp for list of errors
-